window.onload = function(){
    var buttom = document.getElementsByClassName("login_bt")[0];
    var logindiv = document.getElementsByClassName("logindiv")[0];
    var close = document.getElementsByClassName("close_logindiv")[0];
    console.log(buttom);
    console.log(logindiv);

    buttom.onclick = function(){
        logindiv.style.display = "initial";
    }
    close.onclick = function(){
        logindiv.style.display = "none";
    }
    

}